Revert r18449 "Reland r18383: More API cleanup." and r18450 "Unbreak build."
because of broken WebKit bots.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/119323006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18451 ce2b1a6d-e550-0410-aec6-3dcde31c8c00